SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 WB2

2023 WB2

2023 WB2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.482 AU once every 1.80 yr.

Amor Observations: 30
Orbital Period · P
1.80 yr
v(q)
31.6 km/s
v(Q)
18.9 km/s
Diameter · ≈
0.05 km
TJ
4.53
Eccentricity · e
0.2517

Orbit and dynamics

Between its closest point (1.109 AU) and its farthest (1.855 AU), the heliocentric distance changes by 0.746 AU over every revolution.

One full revolution takes 1.80 yr (659 days), computed from the semi-major axis of 1.482 AU.

An eccentricity of 0.252 makes the orbit moderately elongated.

The orbital plane is tilted 8.52° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.6 km/s at perihelion and falls to 18.9 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.25 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 30 individual observations underpins this orbit; the fit leaves an RMS residual of 0.621 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
1.482 AU
Eccentricity
0.2517
Perihelion
1.109 AU
Aphelion
1.855019 AU
Inclination
8.52°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
132.31°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2032-Nov-23 19:22 0.189473 AU
28344735 km
4.60 km/s
2041-Nov-02 08:52 0.297232 AU
44465228 km
4.31 km/s
2050-Oct-09 01:15 0.406703 AU
60841930 km
4.48 km/s
2062-Mar-12 08:19 0.438066 AU
65533760 km
5.21 km/s
2079-Dec-19 23:54 0.215217 AU
32195957 km
6.36 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.25

Orbit Quality

RMS
0.621
Condition
6
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Keep exploring

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